package easy.JZ18;

public class Solution {
    public class TreeNode {
        int val = 0;
        TreeNode left = null;
        TreeNode right = null;

        public TreeNode(int val) {
            this.val = val;

        }
    }

    public void Mirror(TreeNode root) {
        if(root==null)
            return;
        TreeNode temp=root.left;
        root.left=root.right;
        root.right=temp;
        Mirror(root.left);
        Mirror(root.right);
    }
}
